A - Papers appearing in refereed journals
Lee, M. R. F., Connelly, P. L., Tweed, J. K. S., Dewhurst, R. J., Merry, R. J. and Scollan, N. D. 2006. Effects of high-sugar ryegrass silage and mixtures with red clover silage on ruminant digestion. 2. Lipids. Journal of Animal Science. 84 (11), pp. 3061-3070.
|Authors||Lee, M. R. F., Connelly, P. L., Tweed, J. K. S., Dewhurst, R. J., Merry, R. J. and Scollan, N. D.|
The experiment investigated the digestion of lipids from different forage silages in beef steers. Six Hereford x Friesian steers prepared with rumen and duodenal cannulas were given ad libitum access to a high-sugar grass silage, control grass silage, red clover silage, or mixtures of the red clover and each of the grass silages (50:50, DM basis). The experiment was conducted as an incomplete 5 x 5 Latin square, with an additional randomly repeated sequence. Total fatty acid and C18:3n-3 concentrations were greater (P <0.05) for the high-sugar grass silage than the control grass silage or the red clover silage. Dry matter and total fatty acid intake were less (P <0.05) for steers fed the control grass silage than for steers fed the other diets. Duodenal flow of C18:3n-3 was greater (P <0.05), and flows of C18:0 and total C18:1 trans were less (P <0.05), for the red clover silage compared with the 2 grass silage diets, with the mixtures intermediate. These results were supported by a reduction (P <0.05) in biohydrogenation of C18:3n-3 for the red clover silage, with the mixtures again being intermediate. Flows of total branched- and odd-chain fatty acids were greater (P <0.05) for the high-sugar grass silage diet, possibly as a result of greater microbial flow, because these fatty acids are associated with bacterial lipid. Duodenal flows of the chlorophyll metabolite, phytanic acid, were greater (P <0.05) for animals fed the high-sugar grass silage treatments compared with the other treatments. These results confirm the potential for modifying the fatty acid composition of ruminant products by feeding red clover silage.
|Year of Publication||2006|
|Journal||Journal of Animal Science|
|Journal citation||84 (11), pp. 3061-3070|
|Digital Object Identifier (DOI)||doi:10.2527/jas.2005-736|
|Open access||Published as non-open access|
|Publisher||Oxford Univ Press Inc|
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